To clarify in case it wasn't clear in the OP: I'm not complaining about the large number of people who do this - I just find it an odd behavior given what has been established in the PF about the security of stations, and am wondering what the rationales and reasons are behind characters doing it - is it just a symbolic gesture or force of habit? Or are some characters that genuinely concerned that they'll carry it even if it's going to be more or less unusable while they're out and about?
In any case, it's a plenty big universe. While I imagine it's difficult to wander around the CAS station in Cistuvaert while openly carrying, not every station would be this strictly controlled.
This is certainly true, but I'd expect that the vast majority of highsec stations, as well as a fair portion of lowsec stations (particularly ones owned by military and R&D corporations) would be on the stricter end of the spectrum, while stations belonging to "outlaw factions" (or "alternative Empires" as Inara loves to call them) in NPC nullsec would be on the more lax end. Stations owned by player entities I'd expect to fall anywhere in between, and would change depending on who was in charge at any given moment.
In Morwen-
c's particular case, she's had both formal training with both firearms and knives in the Navy Academy after she joined, and she had informal training on the use of firearms with her father (who serves/served in the Navy) while growing up. Daddy didn't want to have to get the shotgun off the mantle when the boys came knocking, he wanted his little girl to be able to handle the job herself. Well, okay, I'm kidding on that last part, of course, but you get the idea.
So, she knows how to use either of them, but she generally doesn't carry. Why? Because she sees it as superfluous and a waste of time and effort for the majority of places she visits. The stationside bars and other establishments she frequents are reasonably well secured, and with the exception of the Last Gate, would confiscate whatever she was carrying anyway. (Veto employees are allowed to carry corporate-issued firearms in the Gate; these models are keyed specifically to one user and will not fire in the hands of anyone but their owner.)
As for planetside venues like the Basilica or Mercy's Keep, it's a similar issue: they're either well-secured and/or whatever she had on her would be confiscated on entry, with the additional caveat that as they are planetside, she's already at higher risk for an "accident" than she would be on a station, so the idea is to draw less attention to herself and not give anyone an excuse to give her a second glance.
That's not to say that there are zero situations where she would ever walk around armed, though. She'd never step off of one of her ships and out of her hangar in Curse unarmed, for example. I could maybe see her carrying a knife around for decorative purposes as well, but it's not something that'd be particularly common or frequent.
Realistically, there's no foolproof security system. It's simply not possible to enforce. "The more they overthink the plumbing, the easier it is to stop up the drain." is a great way of explaining it. There's always someone that's one step ahead of the game; modern example is ceramic weaponry that's difficult to detect.
Agreed, but in a universe where the cops have magical voodoo that prevents you from using a wormhole, anything can happen. >.>
... infamous knife-shoe boot?!
... Klebb?
Someone likes their Bond movies.